new testcase that crashes the instcombine pass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28100 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/2006-05-04-DemandedBitCrash.ll b/test/Transforms/InstCombine/2006-05-04-DemandedBitCrash.ll
new file mode 100644 (file)
index 0000000..2a6a441
--- /dev/null
+++ b/test/Transforms/InstCombine/2006-05-04-DemandedBitCrash.ll
@@ -0,0 +1,50 @@
+; RUN: llvm-as < %s | opt -instcombine -disable-output
+
+void %test() {
+bb38.i:
+       %varspec.0.i1014 = cast long 123814269237067777 to ulong                ; <ulong> [#uses=1]
+       %locspec.0.i1015 = cast int 1 to uint           ; <uint> [#uses=2]
+       %tmp51391.i1018 = shr ulong %varspec.0.i1014, ubyte 16          ; <ulong> [#uses=1]
+       %tmp51392.i1019 = cast ulong %tmp51391.i1018 to uint            ; <uint> [#uses=2]
+       %tmp51392.mask.i1020 = shr uint %tmp51392.i1019, ubyte 29               ; <uint> [#uses=1]
+       %tmp7.i1021 = and uint %tmp51392.mask.i1020, 1          ; <uint> [#uses=2]
+       %tmp18.i1026 = shr uint %tmp51392.i1019, ubyte 31               ; <uint> [#uses=2]
+       %tmp18.i1027 = cast uint %tmp18.i1026 to ubyte          ; <ubyte> [#uses=1]
+       br bool false, label %cond_false1148.i1653, label %bb377.i1259
+
+bb377.i1259:           ; preds = %bb38.i
+       br bool false, label %cond_true541.i1317, label %cond_false1148.i1653
+
+cond_true541.i1317:            ; preds = %bb377.i1259
+       %tmp545.i1318 = shr uint %locspec.0.i1015, ubyte 10             ; <uint> [#uses=1]
+       %tmp550.i1319 = shr uint %locspec.0.i1015, ubyte 4              ; <uint> [#uses=1]
+       %tmp550551.i1320 = and uint %tmp550.i1319, 63           ; <uint> [#uses=1]
+       %tmp553.i1321 = setlt uint %tmp550551.i1320, 4          ; <bool> [#uses=1]
+       %tmp558.i1322 = seteq uint %tmp7.i1021, 0               ; <bool> [#uses=1]
+       %bothcond.i1326 = or bool %tmp553.i1321, false          ; <bool> [#uses=1]
+       %bothcond1.i1327 = or bool %bothcond.i1326, false               ; <bool> [#uses=1]
+       %bothcond2.not.i1328 = or bool %bothcond1.i1327, false          ; <bool> [#uses=1]
+       %bothcond3.i1329 = or bool %bothcond2.not.i1328, %tmp558.i1322          ; <bool> [#uses=0]
+       br bool false, label %cond_true583.i1333, label %cond_next592.i1337
+
+cond_true583.i1333:            ; preds = %cond_true541.i1317
+       br bool false, label %cond_true586.i1335, label %cond_next592.i1337
+
+cond_true586.i1335:            ; preds = %cond_true583.i1333
+       br label %cond_true.i
+
+cond_next592.i1337:            ; preds = %cond_true583.i1333, %cond_true541.i1317
+       %mask_z.0.i1339 = phi uint [ %tmp18.i1026, %cond_true541.i1317 ], [ 0, %cond_true583.i1333 ]            ; <uint> [#uses=0]
+       %tmp594.i1340 = and uint %tmp545.i1318, 15              ; <uint> [#uses=0]
+       br label %cond_true.i
+
+cond_false1148.i1653:          ; preds = %bb377.i1259, %bb38.i
+       %tmp1150.i1654 = seteq uint %tmp7.i1021, 0              ; <bool> [#uses=1]
+       %tmp1160.i1656 = seteq ubyte %tmp18.i1027, 0            ; <bool> [#uses=1]
+       %bothcond8.i1658 = or bool %tmp1150.i1654, %tmp1160.i1656               ; <bool> [#uses=1]
+       %bothcond9.i1659 = or bool %bothcond8.i1658, false              ; <bool> [#uses=0]
+       br label %cond_true.i
+
+cond_true.i:           ; preds = %cond_false1148.i1653, %cond_next592.i1337, %cond_true586.i1335
+       ret void
+}